Preheat oven to 350F, place streusel on a parchment lined baking tray and bake for 10 minutes, let cool completely.
Make up the donut mix according to manufacturer’s instructions. Fry and let cool completely. Fill donuts with blueberry filling, Mix together 1oz blueberry fruit bits and 1 pound white flat icing, dip donuts in prepared icing and sprinkle with cooled streusel.
Bismark, Bismarck, Berliner,Doughnut